The Inc. 5000 list is out — here's how Houston faired this year. Photo by Natalie Harms

One hundred businesses in the Houston area — including the top-ranked company in Texas — have been named to the 2024 Inc. 5000 list of the country’s fastest-growing private companies.

The 2024 Inc. 5000 ranks companies based on their percentage growth in revenue from 2020 to 2023.

Topping the list of Houston-area companies on the list is The Woodlands-based Segment HR, which notched revenue growth of 7,353 percent. That growth rate earned Segment HR the No. 32 spot on the national list and the No. 1 ranking in Texas.

Founded in 2018 by former federal HR specialist Robin Scott, Segment HR specializes in providing HR support for federal agencies. The company employs remote HR specialists in 23 states and the District of Columbia.

Here’s the list of the top 25 Houston-area companies in the 2024 edition of the Inc. 5000, including each company’s headquarters city, growth rate, and national ranking:

  • Segment HR, The Woodlands, 7,353 percent, No. 32
  • Dhanani Private Equity Group, Stafford, 3,617 percent, No. 89
  • Realty.com, Houston 3,052 percent, No. 107
  • Turtlebox Audio, Houston, 1,913 percent, No. 209
  • Amundson Group, Houston, 1,306 percent, No. 332
  • Valiant Business Lending, Houston, 1,286 percent, No. 337
  • Strategic Office Support, Houston, 1,192 percent, No. 367
  • 10xTravel, Houston, 1,102 percent, No. 401
  • NOW Insurance, Houston, 797 percent, No. 559
  • Explore Group, Houston, 796 percent, No. 562
  • Specialty1 Partners, Houston, 728 percent, No. 631
  • FINBOA, Houston, 714 percent, No. 650
  • BroCoTec, Houston, 687 percent, No. 690
  • Elite Roofing, Houston, 675 percent, No. 706
  • Patriot Bolt, Humble, 641 percent, No. 757
  • CT Sounds, Houston, 624 percent, No. 789
  • Supreme Jewelers, Friendswood, 525 percent, No. 965
  • Dometik Commercial Construction, Cypress, 477 percent, No. 1,070
  • Vape City, Houston, 459 percent, No. 1,116
  • Highlands Construction, Houston, 451 percent, No. 1,132
  • Houston Tents and Events, Houston, 438 percent, No. 1,171
  • Goebel Fasteners, Houston, 385 percent, No. 1,340
  • Field Industries, Houston, 376 percent, No. 1,366
  • Coverflex Manufacturing, Houston, 365 percent, No. 1,410

“One of the greatest joys of my job is going through the Inc. 5000 list,” says Mike Hofman, editor-in-chief of Inc. magazine. “To see all of the intriguing and surprising ways that companies are transforming sectors, from health care and AI to apparel and pet food, is fascinating for me as a journalist and storyteller.”

Elsewhere in Texas:

  • Austin-based Maev led the Austin-area pack with a growth rate of 6,734 percent, earning the No. 38 spot on the national list.
  • Dallas-based Archer Review led the Dallas-area pack with a growth rate of 5,771 percent, earning the No. 46 spot on the national list.
  • LaVernia-based Begesh led the San Antonio-area pack with a growth rate of 1,111 percent, earning the No. 396 spot on the national list.
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CultureMap Emails are Awesome

How Houston innovators played a role in the historic Artemis II splashdown

safe landing

Research from Rice University played a critical role in the safe return of U.S. astronauts aboard NASA’s Artemis II mission this month.

Rice mechanical engineer Tayfun E. Tezduyar and longtime collaborator Kenji Takizawa developed a key computational parachute fluid-structure interaction (FSI) analysis system that proved vital in NASA’s Orion capsule’s descent into the Pacific Ocean. The FSI system, originally developed in 2013 alongside NASA Johnson Space Center, was critical in Orion’s three-parachute design, which slowed the capsule as it returned to Earth, according to Rice.

The model helped ensure that the parachute design was large enough to slow the capsule for a safe landing while also being stable enough to prevent the capsule from oscillating as it descended.

“You cannot separate the aerodynamics from the structural dynamics,” Tezduyar said in a news release. “They influence each other continuously and even more so for large spacecraft parachutes, so the analysis must capture that interaction in a robustly coupled way.”

The end result was a final parachute system, refined through NASA drop tests and Rice’s computational FSI analysis, that eliminated fluctuations and produced a stable descent profile.

Apart from the dynamic challenges in design, modeling Orion’s parachutes also required solving complex equations that considered airflow and fabric deformation and accounted for features like ringsail canopy construction and aerodynamic interactions among multiple parachutes in a cluster.

“Essentially, my entire group was dedicated to that work, because I considered it a national priority,” Tezduyar added in the release. “Kenji and I were personally involved in every computer simulation. Some of the best graduate students and research associates I met in my career worked on the project, creating unique, first-of-its-kind parachute computer simulations, one after the other.”

Current Intuitive Machines engineer Mario Romero also worked on Orion during his time at NASA. From 2018 to 2021, Romero was a member of the Orion Crew Capsule Recovery Team, which focused on creating likely scenarios that crewmembers could encounter in Orion.

The team trained in NASA’s 6.2-million-gallon pool, using wave machines to replicate a range of sea conditions. They also simulated worst-case scenarios by cutting the lights, blasting high-powered fans and tipping a mock capsule to mimic distress situations. In some drills, mock crew members were treated as “injured,” requiring the team to practice safe, controlled egress procedures.

“It’s hard to find the appropriate descriptors that can fully encapsulate the feeling of getting to witness all the work we, and everyone else, did being put into action,” Romero tells InnovationMap. “I loved seeing the reactions of everyone, but especially of the Houston communities—that brought me a real sense of gratitude and joy.”

Intuitive Machines was also selected to support the Artemis II mission using its Space Data Network and ground station infrastructure. The company monitored radio signals sent from the Orion spacecraft and used Doppler measurements to help determine the spacecraft's precise position and speed.

Tim Crain, Chief Technology Officer at Intuitive Machines, wrote about the experience last week.

"I specialized in orbital mechanics and deep space navigation in graduate school,” Crain shared. “But seeing the theory behind tracking spacecraft come to life as they thread through planetary gravity fields on ultra-precise trajectories still seems like magic."

UH breakthrough moves superconductivity closer to real-world use

Energy Breakthrough

University of Houston researchers have set a new benchmark in the field of superconductivity.

Researchers from the UH physics department and the Texas Center for Superconductivity (TcSUH) have broken the transition temperature record for superconductivity at ambient pressure. The accomplishment could lead to more efficient ways to generate, transmit and store energy, which researchers believe could improve power grids, medical technologies and energy systems by enabling electricity to flow without resistance, according to a release from UH.

To break the record, UH researchers achieved a transition temperature 151 Kelvin, which is the highest ever recorded at ambient pressure since the discovery of superconductivity in 1911.

The transition temperature represents the point just before a material becomes superconducting, where electricity can flow through it without resistance. Scientists have been working for decades to push transition temperature closer to room temperature, which would make superconducting technologies more practical and affordable.

Currently, most superconductors must be cooled to extremely low temperatures, making them more expensive and difficult to operate.

UH physicists Ching-Wu Chu and Liangzi Deng published the research in the Proceedings of the National Academy of Sciences earlier this month. It was funded by Intellectual Ventures and the state of Texas via TcSUH and other foundations. Chu, founding director and chief scientist at TcSUH, previously made the breakthrough discovery that the material YBCO reaches superconductivity at minus 93 K in 1987. This helped begin a global competition to develop high-temperature superconductors.

“Transmitting electricity in the grid loses about 8% of the electricity,” Chu, who’s also a professor of physics at UH and the paper’s senior author, said in a news release. “If we conserve that energy, that’s billions of dollars of savings and it also saves us lots of effort and reduces environmental impacts.”

Chu and his team used a technique known as pressure quenching, which has been adapted from techniques used to create diamonds. With pressure quenching, researchers first apply intense pressure to the material to enhance its superconducting properties and raise its transition temperature.

Next, researchers are targeting ambient-pressure, room-temperature superconductivity of around 300 K. In a companion PNAS paper, Chu and Deng point to pressure quenching as a promising approach to help bridge the gap between current results and that goal.

“Room-temperature superconductivity has been seen as a ‘holy grail’ by scientists for over a century,” Rohit Prasankumar, director of superconductivity research at Intellectual Ventures, said in the release. “The UH team’s result shows that this goal is closer than ever before. However, the distance between the new record set in this study and room temperature is still about 140 C. Closing this gap will require concerted, intentional efforts by the broader scientific community, including materials scientists, chemists, and engineers, as well as physicists.”

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This article originally appeared on EnergyCapitalHTX.com.